ASoC: dt-bindings: simple-card: add missing #address-cells/#size-cells

In case of using MIXer with Simple Audio Card, it needs below DT.

simple-audio-card,dai-link@1 {
cpu@0 {
...
};
cpu@1 {
...
};
...
};

This case, it requires "reg = <xxx>" which needs #address-cells/#size-cells,
but simple-audio-card.yaml is missing these. This patch adds it.

Without this patch, we will get below warning.

${LINUX}/arch/arm64/boot/dts/renesas/r8a77950-ulcb.dtb: sound: simple-audio-card,dai-link@0: '#address-cells', '#size-cells' do not match any of the regexes: '^codec(@[0-9a-f]+)?', '^cpu(@[0-9a-f]+)?', 'pinctrl-[0-9]+'
From schema: ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.yaml

Link: https://lore.kernel.org/r/[e-mail]
Reported-by: Rob Herring <[e-mail]>
Signed-off-by: Kuninori Morimoto <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/sound/simple-card.yaml

···
       reg:
         maxItems: 1
 
+      "#address-cells":
+        const: 1
+      "#size-cells":
+        const: 0
       # common properties
       frame-master:
         $ref: "#/definitions/frame-master"